Add configure check for libintl.h

There are some distributions which do not provide gettext support within
libc.

For these cases checking for libintl is required.

https://fedorahosted.org/freeipa/ticket/1840

ipa-client/Makefile.am

@@ -50,6 +50,7 @@ ipa_getkeytab_LDADD = 		\
 	$(OPENLDAP_LIBS)	\
 	$(SASL_LIBS)		\
 	$(POPT_LIBS)		\
+	$(LIBINTL_LIBS)         \
 	$(NULL)
 
 ipa_rmkeytab_SOURCES =		\
@@ -60,6 +61,7 @@ ipa_rmkeytab_SOURCES =		\
 ipa_rmkeytab_LDADD = 		\
 	$(KRB5_LIBS)		\
 	$(POPT_LIBS)		\
+	$(LIBINTL_LIBS)         \
 	$(NULL)
 
 ipa_join_SOURCES =		\
@@ -75,6 +77,7 @@ ipa_join_LDADD = 		\
 	$(CURL_LIBS)		\
 	$(XMLRPC_LIBS)		\
 	$(POPT_LIBS)		\
+	$(LIBINTL_LIBS)         \
 	$(NULL)
 
 SUBDIRS =			\

ipa-client/configure.ac

@@ -174,6 +174,21 @@ if test "x$XMLRPC_LIBS" = "x" ; then
 fi
 AC_SUBST(XMLRPC_LIBS)
 
+dnl ---------------------------------------------------------------------------
+dnl - Check for libintl
+dnl ---------------------------------------------------------------------------
+SAVE_LIBS="$LIBS"
+LIBINTL_LIBS=
+AC_CHECK_HEADER(libintl.h, [], [AC_MSG_ERROR([libintl.h not found, please install xgettext])])
+AC_SEARCH_LIBS([bindtextdomain], [libintl],[], [])
+if test "x$ac_cv_search_bindtextdomain" = "xno" ; then
+  AC_MSG_ERROR([libintl is not found and your libc does not support gettext, please install xgettext])
+elif test "x$ac_cv_search_bindtextdomain" != "xnone required" ; then
+  LIBINTL_LIBS="$ac_cv_search_bindtextdomain"
+fi
+LIBS="$SAVELIBS"
+AC_SUBST(LIBINTL_LIBS)
+
 dnl ---------------------------------------------------------------------------
 dnl - Set the data install directory since we don't use pkgdatadir
 dnl ---------------------------------------------------------------------------